8207057: No debug info for assembler files

Summary: Generate debug info for assembler files as needed.
Reviewed-by: erikj

make/autoconf/flags-cflags.m4

@@ -106,11 +106,17 @@ AC_DEFUN([FLAGS_SETUP_SHARED_LIBS],
 
 AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
 [
+  # By default don't set any specific assembler debug
+  # info flags for toolchains unless we know they work.
+  # See JDK-8207057.
+  ASFLAGS_DEBUG_SYMBOLS=""
   # Debug symbols
   if test "x$TOOLCHAIN_TYPE" = xgcc; then
     CFLAGS_DEBUG_SYMBOLS="-g"
+    ASFLAGS_DEBUG_SYMBOLS="-g"
   elif test "x$TOOLCHAIN_TYPE" = xclang; then
     CFLAGS_DEBUG_SYMBOLS="-g"
+    ASFLAGS_DEBUG_SYMBOLS="-g"
   elif test "x$TOOLCHAIN_TYPE" = xsolstudio; then
     # -g0 enables debug symbols without disabling inlining.
     CFLAGS_DEBUG_SYMBOLS="-g0 -xs"
@@ -121,6 +127,7 @@ AC_DEFUN([FLAGS_SETUP_DEBUG_SYMBOLS],
   fi
 
   AC_SUBST(CFLAGS_DEBUG_SYMBOLS)
+  AC_SUBST(ASFLAGS_DEBUG_SYMBOLS)
 ])
 
 AC_DEFUN([FLAGS_SETUP_WARNINGS],

make/autoconf/spec.gmk.in

@@ -534,6 +534,7 @@ COPY_DEBUG_SYMBOLS := @COPY_DEBUG_SYMBOLS@
 ZIP_EXTERNAL_DEBUG_SYMBOLS := @ZIP_EXTERNAL_DEBUG_SYMBOLS@
 
 CFLAGS_DEBUG_SYMBOLS:=@CFLAGS_DEBUG_SYMBOLS@
+ASFLAGS_DEBUG_SYMBOLS:=@ASFLAGS_DEBUG_SYMBOLS@
 
 #
 # Compress (or not) jars

make/common/NativeCompilation.gmk

@@ -251,6 +251,7 @@ define SetupCompileNativeFileBody
         $$($$($1_BASE)_SYSROOT_CFLAGS)
     $1_BASE_CXXFLAGS := $$($$($1_BASE)_CXXFLAGS) $$($$($1_BASE)_EXTRA_CXXFLAGS) \
         $$($$($1_BASE)_SYSROOT_CFLAGS) $$($1_EXTRA_CXXFLAGS)
+    $1_BASE_ASFLAGS := $$($$($1_BASE)_ASFLAGS) $$($$($1_BASE)_EXTRA_ASFLAGS)
 
     ifneq ($$(filter %.c, $$($1_FILENAME)), )
       # Compile as a C file
@@ -266,7 +267,7 @@ define SetupCompileNativeFileBody
       $1_DEP_FLAG := $(C_FLAG_DEPS)
     else ifneq ($$(filter %.s %.S, $$($1_FILENAME)), )
       # Compile as assembler file
-      $1_FLAGS := $$($$($1_BASE)_ASFLAGS)
+      $1_FLAGS := $$($1_BASE_ASFLAGS)
       $1_COMPILER := $(AS)
       $1_DEP_FLAG :=
     else ifneq ($$(filter %.cpp %.cc %.mm, $$($1_FILENAME)), )
@@ -576,6 +577,7 @@ define SetupNativeCompilationBody
   ifeq ($(COMPILE_WITH_DEBUG_SYMBOLS), true)
     $1_EXTRA_CFLAGS += $$(CFLAGS_DEBUG_SYMBOLS)
     $1_EXTRA_CXXFLAGS += $$(CFLAGS_DEBUG_SYMBOLS)
+    $1_EXTRA_ASFLAGS += $$(ASFLAGS_DEBUG_SYMBOLS)
   endif
 
   ifneq ($$($1_REORDER), )